We apologize for the inconvenience caused. We would suggest you to visit nearby Samsung Service Centre so service engineer will examine your device physically. Please find service centre details in the link provided http://www.samsung.com/in/support/servicelocation/
take out S Pen, then turn on and off the "Switch Access" and "Hover Zoom" option on the Vision section of Accessibility settings. Air Command will be back now...credits Ashwin
